[gmortahr]

Hi all!

I'm trying to model a propeller in self-propelled mode in OpenFOAM 11. My computational domain is shown in fig 1 and 2. (D is the propeller diameter).

The boundary conditions (BCs) for farfield that I tested are listed below:

p U
totalPressure pressureInletOutletVelocity (i've done mesh indepence study for this BCs)
fixedValue zeroGradient
fixedValue pressureInletOutletVelocity
freestreamPressure pressureInletOutletVelocity
freestreamPressure zeroGradient

All of them return different thrust and momentum, and none of them coincide with the experimental results. Are these the correct BCs?

My mesh consists of 7.9 million elements, with a maximum non-orthogonality of 65 and a maximum skewness of 2.5.
For turbulence modeling, I am using k-omega SST with a maximum y+ of 0.785, along with low-Reynolds wall functions (kLowReWallFunction and nutLowReWallFunction).
The solver used is SIMPLE (steady-state foamRun) with MRF approach.
I will be glad if you correct or suggest the “correct” BCs.